By: Michael Lynch <git@mtlynch.io>
Fix metadata store test mock Make the remaining test-double methods use mockMetadataStore after the master merge renamed the mock type. This restores the media package test build.
| Time to Start | Worker time | Duration | Time to finish | Idle | |
| Config | 2s | 7s | 7s | 9s | 2s |
| Eval | 5s | 24s | 24s | 30s | 0s |
| Build | 20s | 59s | 2m11s | 2m32s | 1m25s |
| Suite | 2s | 1m31s | 2m30s | 2m32s | 1m27s |